I had success getting the settings that I wanted changed with SSS/Progman. That is: I turned off the infuriating auto-lock, and also "selective unlocking", meaning that I can unlock the entire car with the first unlock remote press.
The install was "easy", albeit slightly convoluted. I'm running on Win7-64bit, and Progman at least ran OK. It had a hard time reading my car at first, but then I tried with the ignition to the "run" position, which seemed to appease it. I'm assuming that the ignition needs to be in this position for any diagnostics/coding?
I didn't venture into DIS yet; Let me know if you come across any tips or tricks, so far I think the purchase was worth it, thanks for the heads up!